Are these all OK?
(two person)
We are diametrically opposed.
We are just the opposite.
We are complete opposite.
We are total opposite.
We are totally unlike
She is the complete opposite of me
.

Question

Answer

hmmm seem's i made a mistake and overlooked a couple words.

Answer

1. correct
2. I would add 'of each other' to the end of the phrase
3. opposites
4. opposites
5. unalike
6. correct

Answer

Not all are OK. 
We are complete opposite(s).
We are total opposite(s).
We are totally unlike (each other).